Hydraulic traveling crane



(N0 MOdel.)

4 Sheets-Sheet 1. E. W. NAYLOR.

HYDRAULIC TRAVELING CRANE.

No. 457,441. Patented Aug. 11, 1891'.

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E.. W. NAYLOR. HYDRAULIC TRAVELING CRANE.

No. 457,441. Patented Aug. 11, 1891.

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E. W. NAYLOR. HYDRAULIC TRAVELING CRANE.

No. 457,441. Patented Aug. 11, 1891.

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E. W. NAYLOR. HYDRAULIC TRAVELING CRANE.

No. 457,441. Patented Aug. 11, 1891.

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UNITEn STATES PATENT OFFICE.

ERNEST WV. NAYLOR, OF CLEVELAND, OHIO.

HYDRAULIC TRAVELING CRANE.

SPECIFICATION forming part of Letters Patent No. 457,441, dated August11, 1891.

Application filed March 2, i891. Serial No. 383,336. (No model.)

To aZZ whmn it may concern:

Be it known that I, ERNEST W. NAYLOR, a subject of the Queen of GreatBritain, residing at Cleveland, in the county of Ouyahoga and State ofOhio, have invented certain new and useful Improvements in HydraulicTraveling Cranes, of which the following is a specification.

My invention relates to traveling cranes; and the object is to provideeffective means whereby the bridge, the trolley, and the hoistingapparatus may be operated by hydraulic power. The track-girders andbridge are of the usual construction; but the essential distinguishingcharacteristics of my invention are these, viz: The bridge carrieshydraulic cylinders anda motor which co-operate with each other and withother coacting parts, as hereinafter set forth, in producing thedifferent movements common to traveling cranes, the water being taken toand from said cylinders and motor through telescoping-pipes, flexiblepipes, or knuckled jointed pipes, as the case may be, the valves towhich may be placed at and operated from any position most convenientfor the operator.

In the drawings, Figure 1 is a top plan view of a hydraulic travelingcrane constructed in accordance with my invention. Fig. 2 is a sectionalside elevation at the point indicated byline 2 2 in Fig. 1. Fig. 3 isanend elevation viewed from that end of the device which is at the topof the sheet containing Fig. 1. Fig. 4 is a detached view of the trolleyand its operating mechanism and the hoisting mechanism,.and Fig. 5 is asectional view on the line 5 5 of Fig. 4.

I will now proceed to describe in detail the embodiment of my invention,which is shown in the drawings.

Referring to the parts by letter, A A represent the longitudinaltrack-girders, which By connecting one cylinder of each pair with thepressure-column and the other with the exhaust-column the bridge ismoved in one direction or the other, as the case may be. By thusarranging a pair of oppositely-acting hydraulic cylinders and associatedplungers at each end of the bridge said bridge is kept in properalignment and is moved with the minimum of friction. Both pairs aresimilarly constructed and operate in like manner. Therefore adescription of one pair will answer for both.

O 0 represent two cylinders, which lie parallel to the track-girders andare secured by means of brackets to the end of the bridge. Entering onecylinder from one end and the other cylinder from the opposite endthrough suitably-packed joints are the plungers c c, which are in theform of pipes which are rigidly secured to the adjacent girder. of thepipes'within the cylinders are open,

The ends whereby said pipes serve not only as plun-' gers, but as partsof the means by which the cylinders are connected with the pressure andexhaust columns. The pipes c 0 connect the ends of the pipes c 0,respectively, with the hydraulic accumulator or its equivalent, and thevalves in said pipes c 0 may be located at any convenient point in theirlength.

. When it is desired to move the bridge B in the direction indicated bythe arrow in Fig. l, for example, the valves in the pipes c c are turnedin such manner that the water from the accumulator flows through thepipe 0 into the pipe cand from thence into the cylinder G, and the Waterin the cylinder 0', being forced out through the pipes 0' escapesthrough the valve in the last-named pipe. When the valves are in thereverse position, the bridge movesin the opposite direction.

The valves in the pipes c 0 which control the flow of water to and fromthe cylinders O O, are preferably what are known as threeway valves, andboth of them are preferably connected with a single lever, wherebyeither valve may be opened to permit the flow of water from theaccumulator, while the other valve is simultaneously moved to a positionwhere it permits the escape of water through itself, or both Valves maybe closed, under which condition the bridge is held in a fixed I to thecylinder F by means of the eyebolt at trolley.

position. The lever marked M in the drawings is the lever which may beoperated with the above-described results upon the valves andconsequently upon the bridge. The levers marked 0 and N are similarlyconnected with the valves in the supply-pipes, through which the waterfiows to and from the hoisting mechanism and the trolley mechanism,respectively.

The trolley D is provided with suitable Wheels which run upon tracksextending lengthwise of the bridge. Two cylinders F F are secured to andat one end of the bridge parallel with the tracks thereon, and, asshown, above the trolley. Projecting from each of the cylindersFF is aram, (indicated by the lettersEE,) and each ram has a crosshead at itsend, in which is carried one of the inclined sheaves e e. The chain Hissecured at one end to the cylinder F by means of an eyebolt at h, andafter passing under the sheave e is fastened at its other end to thetrolley. Another chain H, secured at one end It, passes over the sheavec, then around the vertical sheave c fixed at one end of the bridge, andits other end is secured to the When the ram E is moving out of itscylinder, the other ram E is being forced back into its cylinder, thusmoving the trolley to the left, as shown in Fig. 4. When the ram E ismoving out of its cylinder, the ram E is being forced back into itscylinder, and

the trolley is consequently drawn toward ,the

right.

The means shown for admitting water to and permitting its escape fromthe cylinders F F consist of two cylinders G G, secured to one end ofthe bridge and lying parallel to the cylinders O 0. Through each ofthese cylinders G G passes one of the telescopingpipes g g, which aresupported at their ends above the track-girders by suitable brackets.The pipes f f connect the cylinders F F with the cylinders G G,respectively, substantially as shown. Each of the pipes g g is pluggedat or near its middle, and water is admitted to and permitted to escapefrom said pipes through the supply-pipes g 9 which are connected withthe accumulator. Near the plugs and in the parts of said pipes g g whichare always covered by the associated cylinders aresuitableopenings,thr0ugh which water passes from each of the pipes g g into itsassociated cylinder, and from thence to the cylinders F F. As beforeexplained, the valves in the pipes g g are connected with a hand-lever Nin such manner that both valves the bridge B, and a chain-barrel J orits equivalent, which is also mounted on the bridge and is connectedwith the motor by a suitable chain of gears, as shown at the right ofFig. at. As shown, about five revolutions of the crank-shaft of themotor are necessary to revolve the chain-barrel once,whereby the load onthe chain K may be carried through as short a-distance as required. Thechain K, extending lengthwise of the bridge, is fastened thereto at 7cat the end opposite to that which carries the hydraulic motor. Thischain passes over a sheave d on the trolley, down around a sheave in ablock L, up over a second sheave d on the trolley, and thence to thechain-barrel J, by which it is taken up. The motorI is connected bymeans of the pipes 1; 2" with two cylinders R R", secured to one end ofthe bridge and lying parallel to the other cylinders c and g, heretoforedescribed. Passing through each of these cylinders is one of thetelescoping-pipes r 7', which are secured in a fixed position above thetrackgirders by any suitable brackets. These pipes are plugged at ornear the middle, and in a part of each pipe, which is always covered byits associated cylinder, are formed openings, through which the waterpasses from the pipe into its cylinder or in the reverse direction, asthe case may be. Water is admitted to these pipes r 1" through thesupply-pipes r r which are connected with the accumulator, and theirvalves are operated as are the valves in the other supply pipesheretofore described-that is to say, the valves will permit the escapeof water from either pipe while it is being forced from the accumulatorthrough the other pipe, whereby the motor may be operated in eitherdirection for the purpose claims to the construction shown and here- 1inafter described to any greater extent than is distinctly expressed bythe language ,of said claims.

Having thus described my invention, what I claim as new, and desire tosecure by Letters Patent, is i r 1. The combination of the track-girdersand the bridge movable thereon, with two cylinders lying parallel to thetrack-girders and fixed to said bridge, two stationary plungers whichenter said cylinders, respectively, from opposite ends, andvalve-controlled supply pipes suitably connected with said cylinders,whereby water may be simultaneously forced into either cylinder andpermitted to escape from the other, substantially as described.

2. The combination of the track-girders, a

bridge movable thereon, and two cylinders secured t0 the bridge andlying parallel to said girders, two telescoping-pipes entering saidcylinders, respectively, from opposite sides, said pipes being rigidlyheld in a fixed position parallel to said girders, and supply-pipesconnecting said telescoping-pipes with an accumulator, and valves insaid supply-pipes, substantially as and for the purpose specified.

3. The combination of an elevated movable bridge, a reversible hydraulicmotor mounted on the bridge, a cable-take-up device, and suitableconnecting-gearing between the motor and take-up device,with two pipesin which water may flow from the accumulator to said motor, valves insaid pipes, respectively, at a point where they may be operated from thefloor, whereby either of said pipes may be connected with theexhaust-column, while the other is simultaneously connected with thepressure-column, substantially as and for the 5 The combination of amovable bridge, a reversible hydraulic motor secured thereto, a trolley,a chain, a chain-barrel, and connecting devices between saidchain-barrel and motor, with two cylinders secured to the bridge andlying parallel to its path of travel, two pipes connecting saidcylinders with said motor, two pipes fixed in position telescoping saidcylinders, two supply-pipes connecting said fixed pipes with anaccumulator, and valves in said supply-pipes, substantially as and forthe purpose specified.

6. The combination of the track-girders and a bridge having mountedthereon, first, a trolley; second, a reversible hydraulic motor; third,hoisting and lowering mechanism, and, fourth, two oppositely-actinghydraulic rams and their associated cylinders, all connected,substantially as described, with three pairs of cylinders rigidlysecured to the end of the bridge, one pair connected with the motor andone pair with the cylinders of the oppositely-actin g rams, a pair oftelescoping-pipes entering from opposite ends of the third pair ofcylinders, two pairs of telescoping-pipes entering the two pairs ofcylinders first designated, and six valve-controlled supply-pipesconnected withsaid six telescoping-pipes, substantially as and for thepurpose specified.

I ERNEST W. NAYLOR.

Witnesses:

HARoLD SMITH, ALBERT H. BATES.

